Apparatus and method for providing drivable distance information of vehicle

Abstract

An apparatus and method of providing distance-travelable information of a vehicle, the distance-travelable information providing method including determining, by a controller, an initial predicted DTE based on an initial DTE (Distance to Empty: distance-travelable), where the initial DTE is a distance-travelable at a time point in which the vehicle begins to travel, and where the initial predicted DTE is a distance-travelable at a time point in which the vehicle begins to travel, and where the initial predicted DTE is a distance-travelable at a time point in which the vehicle begins to travel. The initial prediction DTE is a predicted travelable distance changing along with the traveling of the vehicle; determining, by the controller, a current DTE as an actual travelable distance in real time every set distance during the travel of the vehicle; and controlling, by the controller, an operation of a display device to display, together with the initial predicted DTE, actual DTE history information indicating a change history of the current DTE determined as an actual travel distance increases, while the vehicle is traveling.

Description

Technical Field

[0001] The present invention relates to a device and method for displaying the remaining driving distance information on a display device such as an instrument panel in an electric vehicle and providing it to a driver. Background Art

[0002] Generally, a vehicle provides a function of predicting the remaining driving distance (Distance To Empty: DTE) and informing the driver. For example, in an internal combustion engine vehicle, the remaining driving distance is predicted based on the fuel level in the fuel tank and informed to the driver through an instrument panel or the like.

[0003] Similarly, in an electric vehicle that runs by driving an electric motor using battery power, the remaining driving distance is estimated based on the current remaining battery charge (remaining capacity) and displayed on an instrument panel or the like.

[0004] In the case of an electric vehicle, compared with an internal combustion engine vehicle, the number of charging stations is small and the charging time is long. Therefore, in an electric vehicle, the driver's attention to the remaining driving distance (DTE) is necessarily high.

[0005] As described above, in an electric vehicle, since the driver is more sensitive to the remaining driving distance (DTE), it is extremely important to accurately calculate and inform the remaining driving distance corresponding to the vehicle's battery charge in real time during driving.

[0006] A method of estimating the remaining driving distance by using the relationship between the remaining battery charge and the energy efficiency (driving range per unit of electric charge) to provide the vehicle's remaining driving distance information has been publicly disclosed. For example, in US Patent No. 9,037,732 (Patent Document 1), a method is disclosed in which the energy efficiency of the power consumption per 100 kilometers is determined by using the information accumulated in the past, and the determined energy efficiency is multiplied by the current remaining battery charge to determine the remaining driving distance.

[0007] In addition, in US Patent No. 9,574,889 (Patent Document 2), a method is disclosed in which a weighted factor is applied to the past driving distance and the driving distance on the current given route and combined to determine the final driving distance, and then the determined driving distance is adjusted according to the occurrence of an event. The disclosed method is a way of determining and adjusting the driving distance by using the information accumulated in the past and the information of the event ahead.

[0008] In Patent Document 1, in order to eliminate the uncertainty of future driving prediction information, the past energy efficiency is used to determine the remaining driving distance, but this can only be applied under the assumption that the future energy consumption tendency remains the same as in the past. However, if the future traffic conditions show a trend different from the information during past driving, there will be a large error in the energy efficiency based on the past information.

[0009] In Patent Document 2, the remaining driving distance is updated whenever an energy-consuming event occurs, but this may lead to overrepresentation or underrepresentation of the impact of the corresponding event on the remaining driving route.

[0010] In addition, a variety of methods for estimating and predicting the remaining driving distance have been publicly available. After vehicle manufacturers predict the remaining driving distance according to their respective methods, they display the predicted remaining driving distance information on the dashboard to inform the driver.

[0011] However, due to the low prediction accuracy of the remaining driving distance (hereinafter referred to as "DTE"), there is a large difference between the change in DTE and the actual driving distance, so there are many quality complaints in this regard. As an existing technology to solve such complaints, there is a known method of providing the current DTE, the minimum (MIN) DTE, and the maximum (MAX) DTE together through the dashboard.

[0012] However, for such an existing technology, in a state where it is impossible to predict what kind of driving the driver will perform in the future, the minimum DTE and the maximum DTE learned based on the recent driving conditions tend to fluctuate significantly, which does not conform to the original intention of DTE for predicting the future remaining driving distance.

[0013] In addition, according to the existing technology, after setting a destination in the navigation device, during the driving to the destination, the predicted DTE value and the actual DTE value are displayed in real time through the display device of the Audio Video Navigation Telematics (hereinafter referred to as "AVNT").

[0014] However, for the existing technology of showing the predicted DTE value and the actual DTE value through AVNT, there are the following problems: one is that the function must be started after setting a destination in the navigation device; the other is that only the final result of the difference between the actual energy consumption value and the predicted value of each function can be confirmed, but the history cannot be confirmed. That is, since the energy consumption history cannot be confirmed, it is impossible to know which function consumed more or less energy in a certain interval. SUMMARY OF THE INVENTION

[0015] Therefore, the present invention is developed to solve the above problems, and its purpose is to provide a device and method for providing the remaining driving distance information of a vehicle, which can display and provide in real time in AVNT the DTE predicted based on the initial DTE at the start of driving, the actual DTE history during driving, and the trend information, so as to inform the driver whether the current driving is fuel-efficient compared to the initial prediction.

[0016] In addition, another object of the present invention is to provide a remaining driving distance display device and method that can effectively guide a driver to drive in an energy-saving manner.

[0017] The objects of the present invention are not limited to the above-mentioned content, and other objects not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs (hereinafter referred to as "ordinary technical personnel") from the following description.

[0018] To achieve the above object, the device for providing remaining driving distance information of a vehicle according to an embodiment of the present invention may include: a display device that displays the remaining driving distance information of the vehicle; and a controller that controls the operation of the display device; wherein, the controller determines an initial predicted DTE based on an initial DTE (Distance to Empty), the initial DTE is the remaining driving distance at the time point when the vehicle starts to drive, the initial predicted DTE is a predicted remaining driving distance that changes as the vehicle drives, during the driving of the vehicle, the current DTE as the actual remaining driving distance is determined in real time at every set distance, and the operation of the display device is controlled so that during the driving of the vehicle, the actual DTE history information and the initial predicted DTE are displayed together, and the actual DTE history information represents the change history of the current DTE determined as the actual driving distance increases.

[0019] Moreover, the method for providing remaining driving distance information of a vehicle according to an embodiment of the present invention may include: a step of determining, by a controller, an initial predicted DTE as a predicted remaining driving distance that decreases as the vehicle drives based on an initial DTE (Distance to Empty) that is the remaining driving distance at the time point when the vehicle starts to drive; a step of determining, by the controller, the current DTE as the actual remaining driving distance in real time at every set distance during the driving of the vehicle; and a step of controlling, by the controller, the operation of the display device so that during the driving of the vehicle, the actual DTE history information and the initial predicted DTE are displayed together, wherein the actual DTE history information represents the change history of the current DTE determined as the actual driving distance increases.

[0020] Thus, according to the device and method for providing remaining driving distance information of a vehicle of the present invention, regardless of whether a destination is set, the predicted DTE based on the initial DTE at the start of driving, the actual DTE history and trend information during driving can be displayed and provided in real time in the AVNT, thereby informing the driver whether the current driving is fuel-efficient compared to the initial prediction.

[0021] In addition, it can be connected to the above DTE display, and the estimated energy consumption and actual energy consumption (driving, air conditioning, electrical load, battery management) are displayed in real time at preset distance intervals, so that the driver can easily know the reason why the DTE change amount is different from the actual driving distance, and display all the histories of which type of energy is used more in a certain interval, so as to provide guidance to the driver on which type of energy needs to be saved to guide more efficient driving from the perspective of fuel economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. showing the structure of the apparatus for performing the process of providing the remaining driving distance information according to the present invention.

[0023] Figure 2 FIG. showing the method for determining the low DTE value and the high DTE value in the present invention.

[0024] Figure 3 FIG. exemplarily showing the display state of the remaining driving distance (DTE) according to the present invention.

[0025] Figure 4 FIG. showing the sequence diagram of the method for displaying the remaining driving distance according to the present invention.

[0026] Figure 5 and Figure 6 FIG. showing another example of the method for describing the process of providing the remaining driving distance information according to the present invention.

[0027] Figure 7 FIG. showing still another example of the method for providing the remaining driving distance information according to the present invention.

[0028] Figure 8 FIG. showing still another example of the method for providing the remaining driving distance information according to the present invention.

[0029] DESCRIPTION OF REFERENCE NUMERALS

[0030] 10: Navigation device

[0031] 20: Battery controller

[0032] 30: Controller

[0033] 31: Vehicle speed calculation unit

[0034] 32: Driving output calculation unit

[0035] 33: Air conditioning output calculation unit

[0036] 34: Converter output calculation unit

[0037] 35: Remaining driving distance calculation unit

[0038] 36: Display control unit

[0039] 40: Display device. Detailed implementation manners

[0040] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The specific structures and functional descriptions disclosed in the embodiments of the present invention are only examples provided to clarify the embodiments based on the concept of the present invention. The embodiments based on the concept of the present invention can be implemented in various forms. Therefore, the present invention should not be limited to the embodiments described in this specification. It should be understood that all modified embodiments, equivalent embodiments, and even alternative embodiments within the spirit and technical scope of the present invention are regarded as being included within the protection scope of the present invention.

[0041] On the other hand, in the present invention, terms such as first and / or second may be used to describe various components, but the components are not limited by these terms. These terms are only used to distinguish one component from other components. For example, within the scope not exceeding the concept covered by the present invention, the first component may also be named the second component. Similarly, the second component may also be named the first component.

[0042] It should be understood that when referring to a component being "connected" or "connected in succession" to another component, it may be directly connected or connected in succession to the other component, or there may be other components in between. On the contrary, when referring to a component being "directly connected" or "directly contacting" another component, it should be understood that there are no other components in between. Different expressions used to describe the relationship between components, such as "between..." and "directly between..." or "adjacent to..." and "directly adjacent to...", should be interpreted in the same way.

[0043] In this specification, the same reference numerals represent the same components. The terms used in this specification are used to describe the embodiments and are not intended to limit the present invention. In this specification, unless otherwise specified, singular words also include their plural forms. In addition, "comprises" and / or "comprising" used in the specification should be understood that the mentioned components, steps, operations, and / or elements do not exclude the existence or addition of one or more other components, steps, operations, and / or elements.

[0044] The present invention relates to an information providing device and method for displaying the remaining driving distance (hereinafter referred to as "DTE") information in an electric vehicle and providing it to a driver.

[0045] In particular, the present invention relates to a device and method for displaying the DTE (Distance to Empty) and energy consumption of an electric vehicle, which, regardless of whether a destination is set, display in real time on a display device the initial predicted DTE calculated based on the initial DTE at the start of driving, the history and trend information of the actual DTE during driving, and at every preset distance interval, display and provide in real time the predicted energy consumption and the actual energy consumption (for driving, air conditioning, electrical load, battery management).

[0046] In addition, the information providing device and method according to the present invention can calculate the drive output by using the low DTE vehicle speed and high DTE vehicle speed set according to vehicle driving conditions such as regions and roads, and the constant-speed fuel economy information reflecting the vehicle configuration characteristics, and use the calculated drive output to calculate and provide the available low DTE and high DTE information according to driving conditions such as regions and roads regardless of whether it is learned.

[0047] In the present invention, while providing the low DTE and high DTE information that changes with the available battery energy (remaining battery charge) through a display device such as the vehicle's instrument panel, the current DTE reflecting the driver's driving tendency and the current vehicle driving state is displayed and provided to the driver in real time through the instrument panel, so as to guide the driver to drive efficiently from the perspective of power consumption efficiency, so that the current real-time DTE (hereinafter referred to as "current DTE" or "actual DTE") can move towards the high DTE side and tend to be consistent.

[0048] The low DTE and high DTE provided by the present invention, as information independent of learning, can be referred to as values that change with the available battery energy regardless of how the driver drives and whether it is learned.

[0049] In the present invention, while the current DTE value is displayed through a display device such as the instrument panel as described above, the low DTE value and high DTE value calculated based on the available battery energy can be displayed together. Therefore, during the driving process, the driver can drive the vehicle while confirming in real time the low DTE value and high DTE value displayed on the display device, and the current DTE value between the low DTE value and high DTE value, so that the current DTE value is closer to the high DTE value than the low DTE value.

[0050] Figure 1 A diagram showing the structure of a device for executing the process of providing the available driving distance information of the present invention, Figure 2 A diagram showing the method for determining the low DTE value and high DTE value in the present invention.

[0051] Figure 2 The process is performed by Figure 1The controller 30 shown performs calculations in real time to obtain the low DTE, high DTE, and current DTE. Additionally, the low DTE, high DTE, and current DTE information determined by the controller 30 can be displayed on the display device 40 and provided to the driver.

[0052] In the present invention, the control process for providing the available driving distance information can be executed by multiple controllers that transfer the necessary information to each other and cooperate in control, or can be executed by an integrated single controller.

[0053] For example, the multiple controllers can include a vehicle controller (Vehicle Control Unit, VCU) as the upper controller, an air conditioning controller (HVAC controller, HVAC: Heating, Ventilation, & Air Conditioning, or Dual Automatic Temperature Control, DATC), and a battery controller (Battery Management System, BMS). On this basis, an electrical load controller can also be included.

[0054] Among them, the electrical load controller can be the controller of a converter that converts the battery power and outputs it to the vehicle electrical components, that is, the controller (LDC controller) of the LDC (Low voltage DC-DC Converter).

[0055] In the present invention, multiple controllers and an integrated single controller can be collectively referred to as a controller, and the control process of the present invention can be executed by such a collectively referred controller. In the following description, unless otherwise distinguished, the "controller" refers to the collectively referred controller.

[0056] Refer to Figure 1 For the description, the controller 30 includes a vehicle speed calculation unit 31, a drive output calculation unit 32, an air conditioning output calculation unit 33, a converter output calculation unit 34, an available driving distance calculation unit 35, and a display control unit 36. The controller 30 including such constituent units can be referred to as an integrated single controller with the above functions.

[0057] Alternatively, in the case where the control process of the present invention is executed by multiple controllers already equipped in the vehicle, the air conditioning output calculation unit 33 can be an air conditioning controller as an independent controller, and the converter output calculation unit 34 can be an electrical load controller (LDC controller) as an independent controller.

[0058] Alternatively, the display control unit 36 may be a display controller, that is, an independent controller connected to or included in the display device to control the operation of the display device 40. Among them, the display device may be a display device within the AVNT, and the display device controller may be an AVNT controller.

[0059] In addition, the vehicle speed calculation unit 31, the drive output calculation unit 32, and the available travel distance calculation unit 35 may also be independent controllers. For example, they may be constituent units included in the vehicle controller VCU.

[0060] In this case, including the vehicle speed calculation unit 31, the drive output calculation unit 32, and the available travel distance calculation unit 35, the air conditioner controller, the converter controller, and the display device controller may be collectively referred to as controllers, and the control process of the present invention for providing available travel distance information may be executed by such collectively referred to controllers.

[0061] In the present invention, the available travel distance calculation unit 35 of the controller 30 may determine the low DTE and the high DTE respectively using the currently available battery energy.

[0062] More specifically, the available travel distance calculation unit 35 of the controller 30 may calculate the low DTE using the low fuel economy related information and the currently available battery energy. In addition, the available travel distance calculation unit 35 of the controller 30 may calculate the high DTE using the high fuel economy related information and the currently available battery energy.

[0063] Among them, the low fuel economy related information includes the low DTE vehicle speed corresponding to the current vehicle driving conditions, and the low DTE total output which is the total battery output at the low DTE vehicle speed.

[0064] In addition, the high fuel economy related information includes the high DTE vehicle speed corresponding to the current vehicle driving conditions, and the high DTE total output which is the total battery output at the high DTE vehicle speed.

[0065] Therefore, the available travel distance calculation unit 35 may calculate the low DTE using the low DTE vehicle speed and the low DTE total output which are the low fuel economy related information, and the currently available battery energy.

[0066] In addition, the available travel distance calculation unit 35 may calculate the high DTE using the high DTE vehicle speed and the high DTE total output which are the high fuel economy related information, and the currently available battery energy.

[0067] Among them, the low DTE total output may be referred to as the total battery output at the low DTE vehicle speed, and the high DTE total output may be referred to as the total battery output at the high DTE vehicle speed.

[0068] In an embodiment of the present invention, the low DTE can be determined as the value obtained by dividing the low DTE vehicle speed by the low DTE total output and then multiplying by the current available battery energy, and the high DTE can be determined as the value obtained by dividing the high DTE vehicle speed by the high DTE total output and then multiplying by the current available battery energy.

[0069] If expressed in a formula, it is as shown in Mathematical Formulas 1 and 2 below.

[0070] [Mathematical Formula 1]

[0071] Low DTE = (Low DTE vehicle speed) / (Low DTE total output) × (Available battery energy)

[0072] [Mathematical Formula 2]

[0073] High DTE = (High DTE vehicle speed) / (High DTE total output) × (Available battery energy)

[0074] The low DTE vehicle speed and the high DTE vehicle speed can be determined by the vehicle speed calculation unit 31 of the controller 30 ( Figure 2 in S12). The low DTE vehicle speed and the high DTE vehicle speed, as values corresponding to the vehicle driving conditions, can use the values preset by the vehicle speed calculation unit 31, which can be values preset according to regional conditions and road conditions. That is, the vehicle speed calculation unit 31 can determine the corresponding low DTE vehicle speed and high DTE vehicle speed according to the regional conditions and road conditions.

[0075] If the controller 30 that calculates the low DTE and the high DTE according to Mathematical Formulas 1 and 2 is a vehicle controller, the vehicle controller can receive the available battery energy information from the battery controller (BMS) 20 in real time for calculating the low DTE and the high DTE.

[0076] In an embodiment of the present invention, the vehicle driving conditions include the regional conditions and road conditions for vehicle driving. In addition, in the present invention, the low DTE vehicle speed means the vehicle speed that can provide a shorter drivable distance (low DTE) according to the regional conditions and road conditions, and the high DTE vehicle speed means the vehicle speed that can provide a longer drivable distance (high DTE) according to the regional conditions and road conditions.

[0077] In an embodiment of the present invention, after the low DTE vehicle speed and the high DTE vehicle speed are preset as values corresponding to the regional conditions and road conditions, according to different regional conditions and road conditions, the corresponding low DTE vehicle speed and high DTE vehicle speed are pre-input and set into the vehicle speed calculation unit 31 of the controller 30 and stored.

[0078] Therefore, the vehicle speed calculation unit 31 of the controller 30 can determine the low DTE vehicle speed and the high DTE vehicle speed corresponding to the area and road where the current vehicle is traveling, respectively, from the setting information in which the low DTE vehicle speed and the high DTE vehicle speed are set, according to the area conditions and road conditions.

[0079] Among them, the area and road information where the current vehicle is traveling can be obtained by the vehicle speed calculation unit 31 of the controller 30 from the navigation information output by the navigation device 10 ( Figure 2 in S11). Among them, the navigation device 10 can be a navigation device based on a telematics system (e.g., Bluelink, UVO, etc.).

[0080] That is, the controller 30 can obtain the area conditions and road condition information for determining the low DTE vehicle speed and the high DTE vehicle speed from the current vehicle position information and the driving road information in the navigation information input by the navigation device 10.

[0081] The following Table 1 shows an example of setting the low DTE vehicle speed and the high DTE vehicle speed. The values therein are exemplary, and the present invention is not limited thereto. The values of the low DTE vehicle speed and the high DTE vehicle speed can be variously changed according to the area conditions and road conditions.

[0082] [Table 1]

[0083]

[0084] As shown in Table 1, the average vehicle speed on the highway is higher than that on the urban road, and the average vehicle speed in North America is higher than that in South Korea and Europe. Generally speaking, the higher the average vehicle speed, the longer the driving distance can be. Therefore, in terms of area conditions and road conditions, the higher the average vehicle speed condition, the higher the values of the low DTE vehicle speed and the high DTE vehicle speed can be set.

[0085] In addition, referring to Table 1, it can be seen that the low DTE vehicle speed is the vehicle speed at which a shorter driving distance (low DTE) can be obtained, so it is set to a higher vehicle speed than the high DTE vehicle speed at which a longer driving distance (high DTE) can be obtained. If driving at a high speed, the driving distance becomes shorter than when driving at a low speed. Therefore, the low DTE vehicle speed at which a shorter driving distance can be obtained is set to a higher vehicle speed value than the high DTE vehicle speed at which a longer driving distance can be obtained.

[0086] In an embodiment of the present invention, the low DTE total output and the high DTE total output refer to the total battery output, which can be determined by the driving distance calculation unit 35 of the controller 30 as the sum of the driving output and the air conditioner output, or can be determined as the sum of the driving output, the air conditioner output, and the converter output.

[0087] Among them, the drive output refers to the battery output used by the motor for vehicle driving, which is determined by the drive output calculation unit 32 of the controller 30 to be a value corresponding to the high DTE vehicle speed or the low DTE vehicle speed as the optimal vehicle speed according to regional conditions and road conditions, and then ( Figure 2 in S13 of

[0088] is input to the driving range calculation unit 35.

[0089] In addition, the air-conditioning output is determined by the air-conditioning output calculation unit 33 and input to the driving range calculation unit 35, and the converter output is determined by the converter output calculation unit 34 and input to the driving range calculation unit 35.

[0090] The air-conditioning output refers to the battery output for the air conditioner, and the converter output refers to the battery output for electrical components. The converter output may be the LDC output that converts battery power and inputs it to the electrical components of the vehicle. Figure 2 in S14 of

[0091] In the drive output calculation unit 32 of the controller 30, the low DTE drive output and the high DTE drive output can be determined according to a mathematical formula with the low DTE vehicle speed and the high DTE vehicle speed input by the vehicle speed calculation unit 31 as input variables. This mathematical formula, as a "vehicle speed - drive output" relationship formula defining the correlation between vehicle speed and drive output, can be a cubic equation.

[0092] The following Mathematical Formula 3 shows a cubic equation for calculating the drive output from the low DTE vehicle speed and the high DTE vehicle speed, that is, calculating the low DTE drive output and the high DTE drive output.

[0093] [Mathematical Formula 3]

[0094] Drive output = a 1 × vehicle speed + a 2 × (vehicle speed) 2 + a 3 × (vehicle speed) 3

[0095] As a cubic equation representing the constant-speed fuel economy curve, Mathematical Formula 3 can perform constant-speed fuel economy tests and evaluations for the corresponding vehicle model in advance during the vehicle development stage to determine the cubic equation of the "vehicle speed - drive output", and obtain a as the coefficient of the cubic equation.1 、a 2 、a 3 value

[0096] In Mathematical Formula 3, the coefficient a as the setting information related to the mathematical formula of the constant-speed fuel economy curve 1 、a 2 、a 3 is an inherent value of the vehicle, showing the vehicle configuration characteristics, and can be obtained through the constant-speed fuel economy test and evaluation process of the corresponding vehicle model

[0097] In the present invention, the coefficient of the constant-speed fuel economy curve is pre-input and stored in the drive output calculation unit 32 of the controller 30, and is used to calculate the drive output from the optimal vehicle speed corresponding to the current regional conditions and road conditions through the mathematical formula of the constant-speed fuel economy curve

[0098] That is, the coefficient can be used to calculate the low DTE drive output and the high DTE drive output from the low DTE vehicle speed and the high DTE vehicle speed respectively through the mathematical formula of the constant-speed fuel economy curve

[0099] The following Mathematical Formulas 4 and 5 show the cubic equations of the constant-speed fuel economy curve for calculating the low DTE drive output and the high DTE drive output from the low DTE vehicle speed and the high DTE vehicle speed

[0100] [Mathematical Formula 4]

[0101] Low DTE drive output = a 1 × (low DTE vehicle speed) + a 2 × (low DTE vehicle speed) 2 + a 3 × (low DTE vehicle speed) 3

[0102] [Mathematical Formula 5]

[0103] High DTE drive output = a 1 × (high DTE vehicle speed) + a 2 × (high DTE vehicle speed) 2 + a 3 × (high DTE vehicle speed) 3

[0104] On the other hand, as described above, the low DTE total output and the high DTE total output, which mean the total battery output, can be determined by the drive output calculation unit 32 input to the travelable distance calculation unit 35 of the controller 30 as the sum of the drive output input to the drive output calculation unit 32 and the air-conditioning output input to the air-conditioning output calculation unit 33. The process of calculating the air-conditioning output by the air-conditioning output calculation unit 33 can be executed through a known process, that is, the air-conditioning output is calculated using the air-conditioning thermal model

[0105] Accordingly, the available driving distance calculation unit 35 of the controller 30 can determine the low DTE total output as the sum of the low DTE drive output and the air conditioner output, and determine the high DTE total output as the sum of the high DTE drive output and the air conditioner output ( Figure 2 in S14 of

[0106]

[0107] Figure 2 Alternatively, the total output can also be determined using the converter output that represents the battery output of the electrical components (electrical loads) of the vehicle. As described above, the converter output input to the converter output calculation unit 34 of the controller 30 can be the LDC output. Figure 2 in S14 of

[0108] In an embodiment of the present invention, the LDC output can use a learned value. To learn the driving tendency of the driver, in the converter output calculation unit 34 of the controller 30, every time a preset 1 km is traveled, a new LDC output value is stored.

[0109] That is, the converter output calculation unit 34 of the controller 30 has n buffers. Every time 1 km is traveled, the LDC output value is stored in one of the n (for example: 25) buffers. At this time, one of the values stored in the n buffers is updated to a new LDC output value every time 1 km is traveled.

[0110] In addition, the LDC output values of the most recently stored m (for example: 10) buffers among the n values stored in the n buffers can be averaged, and the average value is used as the final LDC output value.

[0111] Table 2 below is a table showing an example of calculating the LDC output value.

[0112] [Table 2]

[0113]

[0114] In the example of Table 2, there are a total of 25 buffers, and each buffer stores an LDC output value that is updated every time a set distance (for example: 1 km) is traveled. The LDC output values of the most recently stored 10 buffers among the 25 sequentially stored LDC output values are averaged, and the average value is used as the final LDC output value.

[0115] In the example of Table 2, the value obtained by averaging the LDC output values stored in registers 16 to 25 is 0.70 kW, which is determined as the final LDC output value.

[0116] The LDC output can be learned as described above. However, since the LDC output is a relatively smaller value than the drive output and the air-conditioning output, and the fluctuation range of the LDC output is also small, the LDC output value can be a fixed value without learning, that is, the LDC output value can use a preset value preset for the corresponding vehicle.

[0117] Through the above process, after the available driving distance calculation unit 35 of the controller 30 obtains the low DTE total output and the high DTE total output, together with these total outputs, using the low DTE vehicle speed and the high DTE vehicle speed input by the vehicle speed calculation unit 31 and the battery available energy input by the battery controller 20, as shown in Mathematical Formula 1 and Mathematical Formula 2, the low DTE value and the high DTE value ( Figure 2 in S15) can be obtained.

[0118] Table 3 below shows an example of obtaining the low DTE and the high DTE according to the regional conditions and the road conditions in an arbitrary vehicle.

[0119] [Table 3]

[0120]

[0121] As described above, after determining the low DTE and the high DTE values, the display control unit 36 of the controller 30 can control the operation of the display device 40 so that the low DTE value, the high DTE value, and the current DTE value are displayed on the display device 40 in a preset manner ( Figure 2 in S16).

[0122] The current DTE (actual DTE) is calculated by reflecting the driving tendency of the driver and the current vehicle driving state, and it can be calculated according to a well-known method.

[0123] It is known that there are various well-known methods that can use the driving tendency of the driver related to acceleration and deceleration during vehicle driving, the driving road conditions such as uphill and downhill roads, or real-time driving state information such as the current vehicle speed to calculate the current DTE in real time, and one of these well-known methods can be adopted.

[0124] Those of ordinary skill in the technical field to which the present invention pertains have already understood various methods for calculating the current DTE (current available driving distance) in real time. Therefore, in this specification, the method for calculating the current DTE will not be described in detail.

[0125] The display control unit 36 of the controller 30 can control the operation of the display device 40 so that the current DTE value determined as described above is displayed together with the low DTE value and the high DTE value, thereby providing the driver with the current DTE, low DTE, and high DTE values through the display device 40.

[0126] As described above, through the display device 40 such as the instrument panel, the low DTE and high DTE, together with the current DTE reflecting the driver's driving tendency and the current vehicle driving state, are displayed and provided to the driver in real time, so that the driver can be guided to drive efficiently from the perspective of power consumption efficiency, so that the current DTE can move towards the high DTE side and tend to be consistent.

[0127] On the other hand, regardless of whether a destination is set, the initial predicted DTE calculated based on the initial DTE at the start of driving, the actual DTE history and trend information during driving can be displayed in real time through the display device independently of the display of the low DTE, high DTE, and current DTE as described above, and the predicted energy consumption and actual energy consumption (drive, air conditioning, electrical load, battery management) are displayed and provided in real time at preset distance intervals.

[0128] Figure 1 The navigation device in the structure is used to obtain regional conditions and road condition information, which is used to determine the low DTE speed and high DTE speed as described above. However, it only uses the current driving position, and even if no destination is set, the regional conditions and road condition information corresponding to the current driving position can be obtained from the navigation information.

[0129] In the present invention, the low DTE and high DTE obtained as described above can be displayed together with the current DTE in the display device as real-time information, or during the real-time calculation and display of the low DTE and high DTE, if the vehicle operation ends, after storing the final low DTE value and high DTE value, as described later, they can be used as the initial low DTE and initial high DTE values at the time of vehicle startup (KEY ON).

[0130] In the present invention, in a coordinate system with the actual driving distance and DTE as coordinate values, the initial predicted DTE is displayed as a graph, and this graph shows the value that decreases as the actual driving distance increases starting from the initial DTE value. In the graph showing the initial predicted DTE, the initial predicted DTE corresponding to each actual driving distance is the value obtained by subtracting each actual driving distance from the initial DTE value.

[0131] In addition, in the present invention, during vehicle travel, while displaying a graph showing the above-described initial predicted DTE, a graph of the actual DTE history showing the current DTE change history is also displayed in the same coordinate system. This graph shows the current DTE value that continuously changes as the actual travel distance increases, so that the initial predicted DTE value can be compared with the actual DTE history for each actual travel distance.

[0132] In addition, in the present invention, a predicted low DTE graph and a high DTE graph are respectively generated. The low DTE graph shows values that decrease as the actual travel distance increases starting from an initial low DTE value, which is a value less than the initial DTE value at the time when the vehicle starts to travel. The high DTE graph shows values that decrease as the actual travel distance increases starting from an initial high DTE value, which is a value greater than the initial DTE value at the time when the vehicle starts to travel. And the generated predicted low DTE graph and high DTE graph are displayed together with the graph showing the initial predicted DTE.

[0133] In addition, in the display screen of the display device, the above-described initial predicted DTE and the actual DTE history are displayed as values corresponding to the actual travel distance. Moreover, the predicted energy consumption and the actual energy consumption during vehicle travel are displayed as values corresponding to the actual travel distance.

[0134] A more detailed description of the present invention Figure 3 is a graph exemplarily showing the display state of the travelable distance according to the present invention. The horizontal axis (x-axis) represents the distance traveled by the vehicle (hereinafter referred to as "actual travel distance") (km), and the vertical axis (y-axis) represents the DTE value in units of distance (km). The actual travel distance on the horizontal axis can use the value of the odometer.

[0135] Figure 4 is a flowchart showing the travelable distance display method according to the present invention. Referring to Figure 3 and Figure 4 , the travelable distance display method according to the present invention will be described.

[0136] In Figure 3 , the travelable distance information displayed in the display device (ANVT) is exemplarily shown. The example shown is that the DTE (hereinafter referred to as "initial DTE") at the time when the vehicle is started (KEY ON) and the start of travel time point (departure time point), together with the DTE predicted based on the initial DTE during vehicle travel (hereinafter referred to as "initial predicted DTE") and the actual DTE history (current real-time DTE change history) during vehicle travel are displayed as a graph so as to be able to compare with each other.

[0137] During vehicle driving, as the actual driving distance increases, the initial predicted DTE can be obtained by subtracting the actual driving distance from the initial DTE, and it can be displayed as a straight line with a certain slope.

[0138] At this time, as an example of a method for generating and displaying the initial predicted DTE value, after determining the initial DTE value at vehicle startup (KEY ON) as the intercept of the vertical axis (y-axis), a straight line with the same value as the intercept of the horizontal axis (x-axis) can be generated and displayed (refer to Figure 4 S21 in

[0139] In addition, in Figure 3 , the actual DTE history shows the current real-time DTE (that is, the change and history of the current DTE calculated by reflecting the driver's driving tendency and the current vehicle driving state as described above) as a graph. Based on the odometer value as the actual driving distance, every 1 km cycle as the set distance, the actual DTE (current DTE) value can be received from AVNT to display the actual DTE history graph (refer to Figure 4 S22, S23 in

[0140] In the present invention, the initial DTE value is the current DTE value at the vehicle ignition time point, that is, the driving start and departure time point. Therefore, at the vehicle ignition and departure time points, the initial DTE and the actual DTE (current DTE) can start from the same value (refer to Figure 3 ).

[0141] As described above, in the present invention, during vehicle driving, in the coordinate system of the DTE display screen, the initial predicted DTE is displayed as a line graph, and moreover, the continuous change of the current DTE calculated every 1 km cycle as the set distance during driving (that is, the actual DTE historical data) is displayed as a graph such as a line graph. At this time, the last point of the actual DTE history graph represents the current DTE.

[0142] In the present invention, the initial predicted DTE, the actual DTE history, and the current DTE are displayed as a line graph and a graph as shown in Figure 3 , enabling the driver to make real-time comparisons and identifications. At the same time, the driver can not only compare his current DTE with the initial predicted DTE, but also compare the previous actual DTE changes (changes in the current DTE value) and history with the initial predicted DTE.

[0143] Regardless of whether a destination is set in the navigation device, this kind of information provision and DTE data comparison can be executed, and real-time DTE information irrelevant to the destination can be provided to the driver.

[0144] In addition, in Figure 3Another form of the display information displayed in the display device of the present invention is shown, where the estimated energy consumption and the actual energy consumption corresponding to the actual driving distance (based on the odometer value) are displayed together below the DTE information.

[0145] In the energy consumption display information, the horizontal axis represents the actual driving distance (km), and the vertical axis represents the energy (kWh). After calculating the estimated energy consumption and the actual energy consumption (for driving, air conditioning, electrical load, battery management, etc.) values for each set distance interval (for example: 2 km), in the coordinate system with the actual driving distance and energy consumption as the coordinate values, it is displayed in the form of a bar graph or the like and provided to the driver (refer to Figure 4 S21, S24, S25 of

[0146] That is, the drive output calculation unit 32, the converter output calculation unit 34, the air conditioning output calculation unit 33, and the battery controller 20 calculate the drive energy consumption, electrical load energy consumption, air conditioning energy consumption, and battery management energy consumption for each interval, and the interval cumulative energy consumption obtained by summing up the above energy consumptions calculated for each interval (for example: a 2 km interval based on the odometer) is displayed in the display device 40 in the form of a bar graph or the like.

[0147] Among them, the drive energy consumption is the battery energy consumed by the vehicle drive system such as the motor during vehicle driving, and the electrical load energy consumption is the battery energy consumed by the low-voltage electrical components of the vehicle. In addition, the air conditioning energy consumption is the battery energy consumed by the vehicle air conditioner, and the battery management energy consumption is the battery energy consumed by vehicle electrical devices such as battery heaters for battery regulation and other battery management.

[0148] In addition, at the start driving time point, which is the vehicle start (KEY ON) time point, the estimated energy consumption is calculated using the available battery energy and the initial DTE, and it is displayed as the estimated energy consumption for each set distance interval.

[0149] Refer to Figure 3 , the estimated energy consumption is shown as maintaining the initial value obtained at the vehicle ignition time point. That is, the initial value obtained at the vehicle ignition time point is displayed as the intercept of the vertical axis (y-axis), and the estimated energy consumption values for each interval are displayed as a straight line representing the same value as the initial value.

[0150] As described above, while the estimated energy consumption is displayed on the energy consumption display screen, the actual energy consumption (interval cumulative energy consumption) for each interval during vehicle driving is displayed overlapping with the above-mentioned estimated energy consumption.

[0151] Figure 5 and Figure 6FIG. for showing another example of a method for providing remaining driving distance information according to the present invention, showing an example of an initial DTE and an initial predicted DTE, an actual DTE history and a real-time current DTE, and predicted and actual energy consumption histories for each section being displayed on a display device (e.g., an AVNT display device).

[0152] Referring to Figure 5 it can be seen that during vehicle driving, the driving energy consumption in the middle section increases significantly, and the actual DTE (the current DTE at that time) decreases significantly compared to the initial predicted DTE. From this, it can be known that in the corresponding section, the vehicle was driving at high speed and on an uphill section.

[0153] Referring to Figure 6 it can be confirmed that in the initial section, the air-conditioning energy consumption is large, so the actual DTE is smaller than the initial predicted DTE. In addition, in the middle section, the driving energy consumption shows a negative (-) value, from which it can be known that the vehicle was driving on a downhill section. It can also be known that in such a downhill section, due to a large amount of regenerative braking, the actual DTE increases compared to the initial predicted DTE.

[0154] Then, Figure 7 FIG. for showing still another example of a method for providing remaining driving distance information according to the present invention, a straight line with the initial DTE value at the vehicle ignition time point as the intercept on the vertical axis (y-axis) and the horizontal axis (x-axis) is generated to display the initial predicted DTE value.

[0155] Moreover, the change in the current DTE value obtained in real time at every set distance (e.g., 1 km) during vehicle driving, that is, the actual DTE history data, is displayed as a line graph, and in the actual DTE history graph, the starting point represents the same initial DTE value as the starting point of the initial predicted DTE. The final value of the actual DTE history graph represents the current DTE value.

[0156] Moreover, below the DTE information, energy consumption information is displayed for each section, and the predicted energy consumption for each section is displayed as a point using coordinate information. The actual energy consumption for each section, such as the cumulative energy consumption for driving, air-conditioning, electrical load, and battery management in the section, is displayed in the form of a bar graph.

[0157] Among them, battery management includes battery regulation performed for optimal battery charging, and the energy consumption for battery management may include energy consumed for controlling the battery temperature during the battery regulation process, etc. For example, it may include battery heating energy (battery heater energy consumption) consumed to increase the battery temperature.

[0158] Moreover, in Figure 7In the example, information obtained in real time from the vehicle, namely the actual vehicle speed and the actual driving road gradient information, can be displayed together with the DTE information and the energy consumption information in the display device. Thus, based on the displayed information, the driver can be informed whether the reason for the increase or decrease in driving energy is due to the vehicle speed or the gradient. In Figure 7 the actual identification examples of the vehicle speed and gradient information shown in charts and the like are omitted.

[0159] Next, Figure 8 FIG. shows another example of a method for providing the remaining driving distance information according to the present invention, and shows an example of simultaneously displaying a low DTE range and a high DTE range in the DTE information display screen.

[0160] As shown in the figure, a straight line with the low DTE (referred to as "initial low DTE") value at the vehicle ignition time point as the intercepts of the horizontal axis (x-axis) and the vertical axis (y-axis) can be generated as a chart showing the predicted low DTE value and displayed.

[0161] Similarly, a straight line with the high DTE (referred to as "initial high DTE") value at the remaining driving time point at the vehicle ignition time point as the intercepts of the horizontal axis (x-axis) and the vertical axis (y-axis) can be generated as a chart showing the predicted high DTE value and displayed.

[0162] In addition, in a coordinate system with the actual driving distance and the DTE in units of distance as the values of the horizontal axis and the vertical axis respectively, the first region between the initial predicted DTE chart and the predicted high DTE chart is defined as the high DTE range, and the region between the initial predicted DTE chart and the predicted low DTE chart is defined as the low DTE range.

[0163] At this time, in the displayed information, the low DTE range becomes the lower region based on the initial predicted DTE chart and the range between the initial predicted DTE and the predicted low DTE based on the same driving distance.

[0164] In addition, in the displayed information, the high DTE range becomes the upper region based on the initial predicted DTE chart and the range between the initial predicted DTE and the predicted high DTE based on the same driving distance. At this time, a chart showing the actual DTE history is displayed in one of the first region and the second region.

[0165] In addition, in the present invention, the controller can control the operation of the display device so that in the display screen, the first region between the initial predicted DTE chart and the predicted high DTE chart and the second region between the initial predicted DTE chart and the predicted low DTE chart are displayed in different colors.

[0166] That is, the low DTE range and the high DTE range can be displayed as respective preset colors. In the display screen, the two DTE ranges divided based on the initial predicted DTE line graph can be filled with different specified colors so that the driver can easily distinguish and identify them.

[0167] By displaying the low DTE range and the high DTE range together as described above, how the driver's actual DTE history changes within the low DTE range and the high DTE range can be shown, thereby inducing and guiding the driver to drive with high fuel economy.

[0168] The embodiments of the present invention have been described in detail above, but the scope of the rights of the present invention is not limited thereto. Any improved embodiments and variant embodiments made using the basic concepts defined in the claims of the present invention should be included within the scope of the rights protection of the present invention.

Claims

1. A device for providing information on the drivable distance of a vehicle, comprising: A display device, wherein the display device displays information on the drivable distance of the vehicle; and a controller, the controller controlling the operation of the display device; Wherein, the controller is configured as follows: An initial predicted DTE is determined based on the initial DTE, wherein the initial DTE is the drivable distance at the time when the vehicle starts to travel, and the initial predicted DTE is the predicted DTE that changes as the vehicle travels. During vehicle travel, the current DTE as the actual drivable distance is determined in real time at every set distance. The operation of the display device is controlled to display actual DTE history information and the determined initial predicted DTE information together during vehicle driving, wherein the actual DTE history information represents a change history of the current DTE determined as the actual driving distance increases.

2. The device for providing the drivable distance information of a vehicle according to claim 1, wherein: The controller is configured as follows: In a coordinate system having the actual travel distance and DTE as coordinate values, the initial predicted DTE is displayed as a graph showing values ​​that decrease as the actual travel distance increases, starting from the initial DTE value.

3. The device for providing the drivable distance information of a vehicle according to claim 2, wherein: In the graph showing the initial predicted DTE, the initial predicted DTE value corresponding to each actual travel distance is determined as a value obtained by subtracting each actual travel distance from the initial DTE value.

4. The device for providing the drivable distance information of a vehicle according to claim 2, wherein: The controller is configured as follows: In a coordinate system where the horizontal axis represents the actual driving distance and the vertical axis represents the DTE, a straight line is generated with the initial DTE value as the intercept of the horizontal axis and the intercept of the vertical axis. The straight line is displayed in the coordinate system as a graph showing the initial predicted DTE at the time point when the vehicle starts traveling.

5. The device for providing the drivable distance information of a vehicle according to claim 2, wherein: The controller is configured as follows: During vehicle travel, while displaying a graph showing the initial predicted DTE, the actual DTE history information is also displayed in the coordinate system as a graph showing the current DTE change history that continuously changes with an increase in the actual travel distance, This enables comparison of the initial predicted DTE value with the actual DTE history for each actual driving distance.

6. The device for providing the drivable distance information of a vehicle according to claim 2, wherein: The controller is configured as follows: A predicted low DTE chart and a predicted high DTE chart are generated respectively, wherein the low DTE chart shows a value that decreases with an increase in actual driving distance starting from an initial low DTE value, wherein the initial low DTE value is a value that is smaller than an initial DTE value at a time point when the vehicle starts to travel, and the high DTE chart shows a value that decreases with an increase in actual driving distance starting from an initial high DTE value, wherein the initial high DTE value is a value that is larger than the initial DTE value at a time point when the vehicle starts to travel, The operation of the display device is controlled to display the generated low DTE graph and high DTE graph together with the graph showing the initial predicted DTE.

7. The device for providing the drivable distance information of a vehicle according to claim 6, wherein: The controller is configured as follows: controlling the operation of the display device so as to display, in a display screen, a first area between the graph showing the initial predicted DTE and the predicted high DTE graph, and a second area between the graph showing the initial predicted DTE and the predicted low DTE graph in different colors from each other, The operation of the display device is controlled to display the actual DTE history information in one of the first area and the second area.

8. The device for providing the drivable distance information of a vehicle according to claim 1, wherein: The controller is configured as follows: The operation of the display device is controlled so that in a display screen of the display device, while displaying the initial predicted DTE and the actual DTE history as values ​​corresponding to the actual driving distance, the estimated energy consumption and the actual energy consumption during vehicle driving are displayed as values ​​corresponding to the actual driving distance.

9. The device for providing the drivable distance information of a vehicle according to claim 8, wherein: The controller is configured as follows: In a coordinate system using actual travel distance and energy consumption as coordinate values, actual energy consumption in each interval calculated for each preset distance interval during vehicle travel is displayed as a bar graph, and estimated energy consumption in each interval is displayed superimposed on actual energy consumption.

10. The device for providing the drivable distance information of a vehicle according to claim 1 or claim 8, wherein: The controller is configured as follows: After the estimated energy consumption is calculated using the available energy of the battery and the initial DTE at the time when the vehicle starts to travel, the calculated estimated energy consumption is displayed as the estimated energy consumption for each interval at each preset distance interval during the vehicle's travel.

11. The device for providing the drivable distance information of a vehicle according to claim 9, wherein: The actual energy consumption of each interval is determined as the battery energy consumed in real time in each interval, which is: the sum of the driving energy consumed by the driving system including the motor used to drive the vehicle, the electrical load energy consumed by the electrical components, the air conditioning energy consumed by the vehicle air conditioner, and the battery management energy consumed for battery management.

12. The device for providing the drivable distance information of a vehicle according to claim 1, wherein: The controller is configured as follows: The operation of the display device is controlled so that, in a display screen of the display device, the initial predicted DTE and the actual DTE history are displayed as values ​​corresponding to the actual travel distance, and the vehicle speed and the driving road slope during vehicle travel are displayed as values ​​corresponding to the actual travel distance.

13. The device for providing the drivable distance information of a vehicle according to claim 1, wherein: The controller is configured as follows: determining low fuel economy related information and high fuel economy related information corresponding to current vehicle driving conditions, determining a low DTE value and a high DTE value based on the determined low fuel economy related information and high fuel economy related information and the current battery available energy, The operation of the display device is controlled to display the determined low DTE value and high DTE value and the current DTE value.

14. A method for providing information on a vehicle's drivable distance, comprising the following steps: The controller determines the initial predicted DTE based on the initial DTE, where: The initial DTE is the drivable distance at the time when the vehicle starts to travel, and the initial predicted DTE is the predicted drivable distance that changes as the vehicle travels; The controller determines in real time the current DTE as the actual drivable distance at every set distance during the vehicle driving; and The controller controls the operation of the display device to display actual DTE history information together with the initial predicted DTE during vehicle driving, wherein the actual DTE history information represents the change history of the current DTE determined as the actual driving distance increases.

15. The method for providing vehicle drivable distance information according to claim 14, wherein: In the step of controlling the operation of the display device, the controller performs the following control: In a coordinate system having the actual travel distance and DTE as coordinate values, the initial predicted DTE is displayed as a graph showing values ​​that decrease as the actual travel distance increases, starting from the initial DTE value.

16. The method for providing vehicle drivable distance information according to claim 15, wherein: The controller performs the following control: In a coordinate system where the horizontal axis represents the actual driving distance and the vertical axis represents the DTE, a straight line is generated with the initial DTE value as the intercept of the horizontal axis and the intercept of the vertical axis. The straight line is displayed in the coordinate system as a graph showing the initial predicted DTE at the time point when the vehicle starts traveling.

17. The method for providing vehicle drivable distance information according to claim 15, wherein: The controller performs the following control: During vehicle travel, while displaying a graph showing the initial predicted DTE, the actual DTE history information is also displayed in the coordinate system as a graph showing the current DTE change history that continuously changes with an increase in the actual travel distance, This enables comparison of the initial predicted DTE value with the actual DTE history for each actual driving distance.

18. The method for providing vehicle drivable distance information according to claim 15, wherein: The controller performs the following control: A predicted low DTE chart and a predicted high DTE chart are generated respectively, wherein the low DTE chart shows a value that decreases with an increase in actual driving distance starting from an initial low DTE value, wherein the initial low DTE value is a value that is smaller than an initial DTE value at a time point when the vehicle starts to travel, and the high DTE chart shows a value that decreases with an increase in actual driving distance starting from an initial high DTE value, wherein the initial high DTE value is a value that is larger than the initial DTE value at a time point when the vehicle starts to travel, The operation of the display device is controlled to display the generated low DTE graph and high DTE graph together with the graph showing the initial predicted DTE.

19. The method for providing vehicle drivable distance information according to claim 18, wherein: The controller performs the following control: controlling the operation of the display device so as to display, in a display screen, a first area between the graph showing the initial predicted DTE and the predicted high DTE graph, and a second area between the graph showing the initial predicted DTE and the predicted low DTE graph in different colors from each other, The operation of the display device is controlled to display the actual DTE history information in one of the first area and the second area.

20. The method for providing vehicle drivable distance information according to claim 14, wherein: In the step of controlling the operation of the display device, the controller performs the following control: The operation of the display device is controlled so that in a display screen of the display device, while displaying the initial predicted DTE and the actual DTE history as values ​​corresponding to the actual driving distance, the estimated energy consumption and the actual energy consumption during vehicle driving are displayed as values ​​corresponding to the actual driving distance.

21. The method for providing vehicle drivable distance information according to claim 20, wherein: The controller performs the following control: In a coordinate system using actual travel distance and energy consumption as coordinate values, actual energy consumption in each interval calculated for each preset distance interval during vehicle travel is displayed as a bar graph, and estimated energy consumption in each interval is displayed superimposed on actual energy consumption.

22. The method for providing vehicle drivable distance information according to claim 21, wherein: The actual energy consumption of each interval is determined as the battery energy consumed in real time in each interval, which is: the sum of the driving energy consumed by the driving system including the motor used to drive the vehicle, the electrical load energy consumed by the electrical components, the air conditioning energy consumed by the vehicle air conditioner, and the battery management energy consumed for battery management.

23. The method for providing vehicle drivable distance information according to claim 14, wherein: In the step of controlling the operation of the display device, the controller performs the following control: The operation of the display device is controlled so that, in a display screen of the display device, the initial predicted DTE and the actual DTE history are displayed as values ​​corresponding to the actual travel distance, and the vehicle speed and the driving road slope during vehicle travel are displayed as values ​​corresponding to the actual travel distance.

24. The method for providing vehicle drivable distance information according to claim 14, wherein: The controller performs the following control: determining low fuel economy related information and high fuel economy related information corresponding to current vehicle driving conditions, determining a low DTE value and a high DTE value based on the determined low fuel economy related information and high fuel economy related information and the current battery available energy, The operation of the display device is controlled to display the determined low DTE value and high DTE value and the current DTE value.

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